cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A128641 Expansion of (1/3) * (c(q)^2 / c(q^2)) / (b(q^2)^2 / b(q)) in powers of q where b(), c() are cubic AGM theta functions.

Table of values

n a(n)
0 1
1 -1
2 4
3 -10
4 20
5 -39
6 76
7 -140
8 244
9 -415
10 696
11 -1140
12 1820
13 -2861
14 4448
15 -6816
16 10292
17 -15372
18 22756
19 -33356
20 48408
21 -69683
22 99600
23 -141312
24 199036
25 -278557
26 387608
27 -536230
28 737632
29 -1009464
30 1374888
31 -1863764
32 2514868
33 -3378948
34 4521672
35 -6027000
36 8002676

List of values

[1, -1, 4, -10, 20, -39, 76, -140, 244, -415, 696, -1140, 1820, -2861, 4448, -6816, 10292, -15372, 22756, -33356, 48408, -69683, 99600, -141312, 199036, -278557, 387608, -536230, 737632, -1009464, 1374888, -1863764, 2514868, -3378948, 4521672, -6027000, 8002676]